The Galileo spacecraft found many interesting landforms on Jupiter’s moon Io. Included are some that look like volcanoes, with active lava streams.
![Io NASA](http://secretsofspace.com/wp-content/uploads/2014/03/io-volcanoes.jpg)
Several high-temperature volcanic hot spots have been detected in this region by both the Near Infrared Mapping Spectrometer (NIMS) and the solid state (CCD) imaging system on-board Galileo. The temperatures detected in this part of Io are consistent with active silicate volcanism in lava flows or inside irregular depressions called calderas (lava lakes).
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